10-102918527-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 3P and 3B. PM2PP2BP4_ModerateBS1_Supporting

The NM_017649.5(CNNM2):c.47G>A(p.Gly16Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000161 in 1,604,416 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00016 ( 0 hom. )

Consequence

CNNM2
NM_017649.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 1.87

Variant links:

Genes affected

CNNM2 (HGNC:103): (cyclin and CBS domain divalent metal cation transport mediator 2) This gene encodes a member of the ancient conserved domain containing protein family. Members of this protein family contain a cyclin box motif and have structural similarity to the cyclins. The encoded protein may play an important role in magnesium homeostasis by mediating the epithelial transport and renal reabsorption of Mg2+. Mutations in this gene are associated with renal hypomagnesemia. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]

CNNM2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant where missense usually causes diseases, CNNM2

BP4

Computational evidence support a benign effect (MetaRNN=0.17726523).

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000144 (22/152322) while in subpopulation NFE AF= 0.000279 (19/68022). AF 95% confidence interval is 0.000182. There are 0 homozygotes in gnomad4. There are 10 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CNNM2	NM_017649.5 linkuse as main transcript	c.47G>A	p.Gly16Glu	missense_variant	1/8	ENST00000369878.9
CNNM2	NM_199076.3 linkuse as main transcript	c.47G>A	p.Gly16Glu	missense_variant	1/7
CNNM2	NM_199077.3 linkuse as main transcript	c.47G>A	p.Gly16Glu	missense_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CNNM2	ENST00000369878.9 linkuse as main transcript	c.47G>A	p.Gly16Glu	missense_variant	1/8	1	NM_017649.5	P4	Q9H8M5-1
CNNM2	ENST00000369875.3 linkuse as main transcript	c.47G>A	p.Gly16Glu	missense_variant	1/2	1			Q9H8M5-3
CNNM2	ENST00000433628.2 linkuse as main transcript	c.47G>A	p.Gly16Glu	missense_variant	1/7	2		A1	Q9H8M5-2

Frequencies

GnomAD3 genomes

AF:

0.000145

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000279

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000574

AC:

AN:

226442

Hom.:

AF XY:

0.0000478

AC XY:

AN XY:

125436

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000301

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000109

Gnomad OTH exome

AF:

0.000184

GnomAD4 exome

AF:

0.000163

AC:

237

AN:

1452094

Hom.:

Cov.:

AF XY:

0.000151

AC XY:

109

AN XY:

722312

show subpopulations

Gnomad4 AFR exome

AF:

0.0000309

Gnomad4 AMR exome

AF:

0.0000906

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000200

Gnomad4 OTH exome

AF:

0.000167

GnomAD4 genome

AF:

0.000144

AC:

AN:

152322

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000279

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000243

Hom.:

Bravo

AF:

0.000113

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000120

AC:

ExAC

AF:

0.0000340

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Nov 27, 2023	This sequence change replaces glycine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 16 of the CNNM2 protein (p.Gly16Glu). This variant is present in population databases (rs370580602, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with CNNM2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1430577). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Nov 14, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2023	CNNM2: PM2:Supporting, PP2 -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 04, 2022	In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Renal hypomagnesemia 6;C4225333:Hypomagnesemia, seizures, and intellectual disability 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Dec 13, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.025

BayesDel_noAF

Uncertain

-0.060

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Benign

0.021

T;.;.

Eigen

Benign

-0.11

Eigen_PC

Benign

0.081

FATHMM_MKL

Benign

0.034

LIST_S2

Benign

0.78

T;T;T

M_CAP

Pathogenic

0.99

MetaRNN

Benign

0.18

T;T;T

MetaSVM

Benign

-0.65

MutationAssessor

Benign

0.0

N;N;N

MutationTaster

Benign

0.95

D;D;D;D;D

PrimateAI

Pathogenic

0.87

PROVEAN

Benign

-1.0

N;N;N

REVEL

Uncertain

0.29

Sift

Uncertain

0.0030

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

0.0010

B;.;B

Vest4

0.14

MVP

0.15

ClinPred

0.22

GERP RS

4.9

Varity_R

0.42

gMVP

0.54

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over